\(\psi _{i+1} := \psi _i + \kappa _i\)  and \(f_{i+1} := f_i + \nu _i\) . The \(\psi _i\) 's are the functions constructed in [1]}, and the \(f_i\) 's are a “stopped” version of the \(\psi _i\) 's. That is, when \(|\nabla _{f_i}f_i|\)  gets too large on a pseudoquad, that pseudoquad is added to \(S_i\) , and the construction ensures that \(f_{k}|_{S_i} = f_{i}|_{S_i}\)  for all \(k>i\) .
